Method of Picking up Edge on the Basis of the Mathematics Morphologic Subject

This article introduce the theory of using the basic mathematics morphologic methods and the flat structuring element to average the image's grey degree and wipe off the yawp and show the using rule of structuring element based on the image's detail as well as the effect. This article also emphasizes the process of integrating the method of using improved Sobel operator and mathematics morphological to pick up the image target' edge in the medical image processing. At the same time, I put forward a algorithm for choosing the Sobel's magnitude on the basis of the image region's gray variance and give a useful way for these and a example.